Marking device for plastics.



G. P. LOVBDAND.

MARKING DEVICE FOR PLASTICS. APPLICATION FILED 0012a. 1012.

1,099,185. Patented June 9,1914.

2 sums-sum 1.

Charles P. L'ovelandl.

Inventor Attorneys G. P. LOVELAND.

MARKING DEVICE FOR PLASTIGS,

APPLICATION FILED OUT 28, 1912.

Patented June 9, 1914.

2 SHEETS-SHEET 22.

Inventor Witnesses:

Charles P. Lovelana.

' Attorneys I COLUMBIA PLANOGIAPH ccuwnsmmrruN, I'L'C.

CHARLES P. LOVELAND, OF MONTREAL, QUEBEC, CANADA.

MARKING DEVICE FOR PLASTICS.

Specification of Letters Patent.

Patented June 9, 1914.

Application filed October 28, 1912. Serial No. 728,210.

To all whom it may concern:

Be it known that I, CHARLES P. LOVELAND, a citizen of the United States of America, residing at Montreal, Province of Quebec, Canada, have invented certain new and useful Improvements in Marking Devices for Plastics; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention to be hereinafter described relates to a device for marking plastics.

In order to more clearly disclose the construction, operation, and use of the invention, reference should be had to the accompanying drawings forming part of the present application.

Throughout the several figures of the drawings like reference characters designate the same parts.

In the drawings: Figure 1 is a top plan view of the pattern, as first cast; Fig. 2 is an end view of the device as assembled, the roller frame being omitted; Fig. 3 is a top plan view of the device as in operation; and Fig. 1 is a detail view of one of the supports of the roller for the pattern.

The main objects of this invention are to provide an endless flexible pattern, in outline, which may be used on a number of different rollers of varying sizes and shapes; which will always work the material correctly; and which may be manufactured in quantities at small cost; and to provide means for limiting and compressing plastic or malleable materials while in a plastic or soft state, in the same operation.

The device consists of a flexible pattern 1 in outline, cast of copper or other flexible material. to represent overlapping paving blocks, as in Fig. 1. The pattern is first cast flat as shown in Fig. 1, then bent into a cyl inder as in Figs. 2 and 3, the edges of the pattern being secured together by welding, soldering, or other suitable means. A roller 2 of approximately half the diameter and a little longer than the cylindrical pattern is placed inside of the said pattern as in Figs. 2 and 3. This roller may be cylindrical, concave, or convex, in shape, according to the work to be done. That is to say; a cylindrical roller will be used for flat surfaces, as the street surface, a concave roller may be used for crown 7 work, or paving between car tracks; or a convex roller may be used for guttering. The roller will conform in shape to the work to be done. The roller is mounted in a suitable frame 3 in the usual way. A cylindrical form of rollerthus used is shown in Fig. 2. If its axis be located a little nearer to the flexible slightly elastic cylindrical pattern 1, the latter will necessarily fit or mold itself on the convex surface of this roller in passing over the same, the general shape of the pattern being slightly deformed by the convexity thus produced therein at the point of contact. The same will obviously be true if a concave surface or a flat surface be presented by the roller to the pattern. The elasticity of the pattern causes its curve to become circular again, or very nearly so, as soon as it passes beyond the roller. Such molding or fitting of the pattern on the roller would not be possible adapted to engage racks 7 for the purpose of locking the arms in any desired position so as to allow the pattern to be shifted as may become necessary.

In order to take up any sagging of the pattern 1, a roller support is provided above the center of the roller 2 and supports the longitudinal center of the upper side of the pattern. The said support consists of a ring sleeve 8 turning on a round bar 9. The said bar has its ends reduced and screw threaded. The ends of the said bar 5) pass through grooves 10 in vertical supports 11 and are secured therethrough by nuts 12, which are screwed on to the ends of the rods 9. It will be obvious that the binding of the nut 12 against the outer face of the support 11 and the binding of the shoulder, caused by the slight reduction of the end of the rod, against its inner face, will combine to hold the rod 9 in any desired vertical position in the slots 10, thus permitting the roller support of the pattern to be adjusted so as to take up any slack in the pattern.

The operation of this device need not be explained in detail. It is only necessary to say that the pattern being flexible it bends to conformto the shape. of the roller as it passes beneath it, and assumes its original or cylindrlcal shape as 1t comes from under the roller because of its slight spring The roller compresses the material by its weight, and. at -:the same time marks it by forcing the pattern into it, as it passes over the pattern. This device is a distinct improvement over the old marking device cons stmg of a pattern cast on a roller.

this insures the. marking from the pattern being 5 true In a concave or convex roller it is next to impossible to cast a true patternon the roller, and even if true there is atendencyfor the marking to drag at the apex ofthe concavity, thus marring the I stamped pattern. This .fault is eliminated by the pattern being separate from the roller, as it operates by its spring to pull vertically upward out of the material being marked, thus making any tendency to F drag lmpossible. Also in my devlce one I pattern can be used with a number of rollers of varying sizes and, shapes. In addition the markings from my device are bound to be true as the pattern is first cast flat, thus insuring absolute correctness.

Also my device is simple in construction and can be easily and cheaply manufactured. The pattern in outline is the usual rib type, having the thin broad backing to limit the entrance of the rib into the material impressed common .to this type of construction. Also the pattern may beof any flexible type;

either jointed so, as to be flexible orv of fiexible material.

It is thought that the construction, op'eration, and use of the invention will be clear from the preceding detailed description.

Changes may be made in the construction, Z

In 7 this device first the pattern is cast flat, and

arrangement, and disposition of-th'e several. parts ofthe invention without in anyway departing from the field and'scope of the same, anditj ismeant to include all such within this japplication'wherein onlya' pre- I ferred form has been disclosed.

Having thus fully described'my invention, 7

what I claimas new and desire tosecure by Letters Patent is:

1. In a marking; device for: plastics,

combination with a supporting frame, an, approximately cylindrical, flexible pattern mounted thereon, and a pressure-applying element resting thereonto deform the same by the action of gravity, the said pattern being free to yield to such pressure, thereby imprinting. the plastic surface below it.

3. In a marking device for plastics,- in

combination with a supporting frame, an approximately cylindrical flexible pattern lmounted thereon, a roller support for the upperpartof said pattern'and a roller within said pattern resting thereon to deform the same by'gravity, said pattern being free; to yield to such deformation, thereby imprint ing the plastic surface below it.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

i CHARLES P. LOVELAND.

JWitnesses:

T. MYNARD,

E. J. GANVIN.

Copies of this patent may be obtained for five centsleach, by addressing the Commissioner of new,

' Washington, D. U. 

